Kaon squeeze-out in heavy ion reactions
| dc.creator | Wang, Z. S. | |
| dc.creator | Fuchs, C. | |
| dc.creator | Faessler, Amand | |
| dc.creator | Gross-Boelting, T. | |
| dc.date | 1998-09-14 | |
| dc.date | 1999-03-12 | |
| dc.date.accessioned | 2026-07-07T05:42:37Z | |
| dc.date.available | 2026-07-07T05:42:37Z | |
| dc.description | The squeeze-out phenomenon of $K^+$ and $K^-$ mesons, i.e. the azimuthal asymmetry of $K^+$ and $K^-$ mesons emitted at midrapidity in heavy ion reactions, is investigated for beam energies of 1-2 A.GeV. It is found that the squeeze-out signal is strongly affected by in-medium potentials of these mesons. The repulsive $K^+$-nucleus potential gives rise to a pronounced out-of-plane emission of $K^+$'s at midrapidity. With the $K^+$ potential we reproduce well the experimental data of the $K^+$ azimuthal distribution. It is found that the attractive $K^-$-nucleus potential cancels to a large extent the influence of rescattering and reabsorption of the $K^-$ mesons on the projectile and target residuals (i.e. shadowing). This results in an azimuthally isotropic emission of the midrapidity $K^-$ mesons with transverse momentum up to 0.8 GeV/c. Since it is well accepted that the shadowing alone would lead to a significant out-of-plane preference of particle emission, in particular at high transverse momenta, the disappearance of the out-of-plane preference for the $K^-$ mesons can serve as an unambiguous signal of the attractive $K^-$ potential. We also apply a covariant formalism of the kaon dynamics to the squeeze-out phenomenon. Discrepancies between the theory and the experiments and possible solutions are discussed. | |
| dc.description | 24 pages Latex using Elsevier style, 7 PS figures, accepted for publication in Euro. Phys. Jour. A | |
| dc.identifier | https://arxiv.org/abs/nucl-th/9809043 | |
| dc.identifier | http://arxiv.org/abs/nucl-th/9809043 | |
| dc.identifier | Eur.Phys.J. A5 (1999) 275-283 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/82998 | |
| dc.subject | Nuclear Theory | |
| dc.title | Kaon squeeze-out in heavy ion reactions | |
| dc.type | text |